Printable worksheets, a different set for every student
A class set of UEERA0036 worksheets: every student gets their own figures, the answer key gives every answer and its working, and each sheet’s code opens it online so a student can check their answers after class.
Class
One per student, up to 40.
Questions
Your browser’s print dialog can also save them as a PDF, to keep this class set. Each sheet holds all 11 questions, about two pages.
Sheet 1, as it prints
KelvinUEERA0036 practice · Sheet 1 of 20Code 7ZX8-TMJ31Work each answer out from the readings and give it in the unit asked. Show your working in the space under each question.
- 1
The suction gauge on an R-32 system reads 9.4 bar g. What is the absolute pressure, in kPa abs?
Answer kPa abs - 2
R-134a is a single-component refrigerant. Its gauge reads 101 kPa g. What is its saturation temperature, in °C?
Answer °C - 3
An idle R-22 system has stood at 32 °C long enough to settle. What should its gauge read, in kPa g?
Answer kPa g - 4
R-410A is a blend. Its suction gauge reads 396 kPa g. What is its dew point, in °C?
Answer °C - 5
An R-449A system: the suction gauge reads 428 kPa g and the suction line, at the evaporator outlet, reads 4.4 °C. What is the superheat, in K?
Answer K - 6
An R-1234yf system: the liquid line gauge reads 171 psi g and the liquid line, at the condenser outlet, reads 41.7 °C. What is the subcooling, in K?
Answer K - 7
R-454C at 477 kPa g: what is its glide (the dew point less the bubble point), in K?
Answer K - 8
R-449A is a zeotropic blend. At the suction pressure, which temperature is its superheat measured from?
- A The liquid line temperature
- B The dew point
- C The bubble point
- D Halfway between the bubble and dew points
- 9
R-407C is a zeotropic blend. At the liquid line pressure, which temperature is its subcooling measured from?
- A The bubble point
- B Halfway between the bubble and dew points
- C The suction line temperature
- D The dew point
- 10
The suction line reads colder than the dew point at the suction pressure, so the superheat works out negative. What does that point to?
- A A blend always reads a negative superheat
- B The vapour is well superheated and the system is running normally
- C Liquid may be reaching the suction line, or a reading or the refrigerant chosen is off
- D The liquid line is subcooled
- 11
A refrigeration gauge reads gauge pressure (kPa g). What is gauge pressure measured against?
- A The condensing pressure
- B A perfect vacuum
- C The pressure of the air around it
- D The refrigerant's critical pressure
How the codes work
A sheet’s code is its questions and its figures, nothing else: typed into UEERA0036 practice, it draws the same questions again, and each one checked shows Kelvin’s answer and working. No names or answers are stored anywhere. Worked out in the browser. Nothing a student types is sent anywhere, and there are no accounts to make.
Open during the pilot
The practice module, the calculator and the P–T charts are free. Printable class sets are open while Kelvin pilots with TAFE classes; after the pilot, they come with an institute licence, along with the class space for handing in and marking.
Practice and teaching material
Practice and teaching material mapped to the unit's code. It isn't an RTO assessment tool: your assessment tools stay yours, and whether you use any of this as evidence is your call.